Question

我在python上学习的网站无法很好地解释字典，因此我求助于此。我应该做的是找到用户键入多少天后这些房间中3个温度的平均值（最大为3）。每天1天有4个温度。当我运行此代码时，这3个房间都不会产生任何温度。

hi={}
days=int(input('How many days of data do you have? '))
print('Average Temperatures:')
f = open('temps1.txt')
g= open('temps1.txt') and open('temps2.txt')
o=open('temps1.txt') and open('temps2.txt') and open('temps3.txt')
if days=='1':
  for line in f:
    parts = line.strip().split(",")
    if parts[0] not in hi:
      hi[parts[0]] = []
    hi[parts[0]].append(int(val[1]))
elif days=='2':
  for line in g:
    parts = line.strip().split(",")
    if parts[0] not in hi:
      hi[parts[0]] = []
    hi[parts[0]].append(int(val[1]))
elif days=='3':
  for line in o:
    parts = line.strip().split(",")
    if parts[0] not in hi:
      hi[parts[0]] = []
    hi[parts[0]].append(int(val[1]))

for k, v in hi.items():
  print("Room: {}, Avg: {}".format(k, sum(v)/days*4))

temps1.txt仅在用户在输入问题中键入1时激活：

Living Room,23
Bedroom,24
Kitchen,22
Living Room,24
Bedroom,26
Kitchen,22
Living Room,25
Bedroom,26
Kitchen,23
Living Room,24
Bedroom,26
Kitchen,23

temps2.txt仅在用户在第一个问题中输入2时激活（与temps1.txt一起使用）：

Living Room,26
Bedroom,24
Kitchen,23
Living Room,27
Bedroom,24
Kitchen,24
Living Room,28
Bedroom,25
Kitchen,26
Living Room,29
Bedroom,26
Kitchen,28

temps3.txt仅在用户在第一个问题中输入3时激活（与temps1.txt和temps2.txt一起使用）：

Living Room,28
Bedroom,29
Kitchen,28
Living Room,28
Bedroom,30
Kitchen,29
Living Room,29
Bedroom,29
Kitchen,31
Living Room,21
Bedroom,23
Kitchen,21

我可以生成一个代码来执行此操作，但是没有这种导入吗？还有一件事，我可以为“ for in”和“ if”语句分配变量吗？

Answer 1

允许拆分数据文件的创建和处理以使其成为minimal verifyable complete example-答案：

def createData():
    """Create demo data as files 'temp1.txt','temp2.txt','temp3.txt'"""
    with open("temp1.txt","w") as f:
        f.write("""Living Room,23
Bedroom,24\nKitchen,22\nLiving Room,24\nBedroom,26\nKitchen,22\nLiving Room,25\nBedroom,26\nKitchen,23\nLiving Room,24\nBedroom,26\nKitchen,23\n""")

    with open("temp2.txt","w") as f:
        f.write("""Living Room,26\nBedroom,24\nKitchen,23\nLiving Room,27\nBedroom,24\nKitchen,24\nLiving Room,28\nBedroom,25\nKitchen,26\nLiving Room,29\nBedroom,26\nKitchen,28\n""")

    with open("temp3.txt","w") as f:
        f.write("""Living Room,28\nBedroom,29\nKitchen,28\nLiving Room,28\nBedroom,30\nKitchen,29\nLiving Room,29\nBedroom,29\nKitchen,31\nLiving Room,21\nBedroom,23\nKitchen,21\n""")

使用此演示数据，我们开始用户输入和计算。我们将所有需要的数据从1到3个文件读取到一个字典中并输出：

# create all data files  
createData()    

# process data 
nrDays = 0

# ask for how many days, catch invalid values until valid one is given
while nrDays not in range(1,4):
    try:
        nrDays=input('How many days of data do you have? [1-3] ')
        nrDays=int(nrDays)
    except: # catchall
        print("Parsing error. 1 to 3 allowed. {} given".format(nrDays))

# read data only from files needed  
temps = {}
for d in range(1,nrDays+1): 
    # format file names as temp1.txt to temp3.txt as needed
    with open ("temp{}.txt".format(d),"r") as f:  # open file
        for line in f:
            if line.strip():     # if line not empty, f.e. dangling newline at end
                room,temp = line.strip().split(",")
                temp = int(temp)   # convert to int
                k = temps.setdefault(room,[]) # creates the empty list if needed
                                              # returns the value if present
                k.append(temp)

print('Average Temperatures:')  

for k, v in temps.items():
      print("Room: {}, Avg: {}".format(k, sum(v)/len(v))) # get the length from the list

输出：

How many days of data do you have? 3
Average Temperatures:
Room: Living Room, Avg: 26.0
Room: Bedroom, Avg: 26.0
Room: Kitchen, Avg: 25.0

How many days of data do you have? 2
Average Temperatures:
Room: Living Room, Avg: 25.75
Room: Bedroom, Avg: 25.125
Room: Kitchen, Avg: 23.875

How many days of data do you have? 1
Average Temperatures:
Room: Living Room, Avg: 24.0
Room: Bedroom, Avg: 25.5
Room: Kitchen, Avg: 22.5

如果您输入1-3以外的任何内容，则会得到一个新的输入提示（如果输入了int）或一条消息以及一个新的提示（如果没有给出int）。

我在做错什么事了吗

1 个答案: